I did think Miles and Julian made a cute couple. They certainly seemed to enjoy each other's company more than they did anyone else. As for the backrub, yeah. Kirk is *really* into it when he thinks Spock is doing it, and puts a stop to it immediately when he realizes it's not Spock working on him. He looks disappointed. I really have no idea what that's supposed to be about if it's not gay. There are lots of little moments like that with K/S, open to interpretation, but sometimes the gay option is the one that makes the most sense, rather than bending over backwards to explain why what just happened wasn't really gay.